How severe is CVE-2026-34494?

CVE-2026-34494 has a CVSS 4.0 base score of 7.2, rated high severity.

Is CVE-2026-34494 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (14th percentile), an estimate of the probability of exploitation in the next 30 days.

How do I fix CVE-2026-34494?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.

When was CVE-2026-34494 published?

CVE-2026-34494 was published on 2026-10-01 and last updated on 2026-10-02.

CVE-2026-34494

CVE-2026-34494 is a high-severity vulnerability with a CVSS 4.0 base score of 7.2. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-1191.

Key facts

Severity: High (CVSS 4.0 base score 7.2)
EPSS exploit prediction: 0% (14th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-1191
Published: 2026-10-01
Last modified: 2026-10-02

Description

- On-Chip Debug Interface vulnerability in Johnson Controls Neo Series MVP2 allows Collect Data from Common Resource Locations. This issue affects Neo Series MVP2: before 3.3b63.

Frequently asked questions

What is CVE-2026-34494?: - On-Chip Debug Interface vulnerability in Johnson Controls Neo Series MVP2 allows Collect Data from Common Resource Locations. This issue affects Neo Series MVP2: before 3.3b63.
How severe is CVE-2026-34494?: CVE-2026-34494 has a CVSS 4.0 base score of 7.2, rated high severity.
Is CVE-2026-34494 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (14th percentile), an estimate of the probability of exploitation in the next 30 days.
How do I fix CVE-2026-34494?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.
When was CVE-2026-34494 published?: CVE-2026-34494 was published on 2026-10-01 and last updated on 2026-10-02.

References

https://www.johnsoncontrols.com/trust-center/cybersecurity/security-advisories

Other CWE-1191 vulnerabilities

CVE-2026-15203 — Critical (CVSS 9.3): Improper access control in debug and engineering interfaces in Danfoss iC7-Automation SP, iC7-Marine, and iC7-Hybrid…
CVE-2024-48970 — Critical (CVSS 9.3): The ventilator's microcontroller lacks memory protection. An attacker could connect to the internal JTAG interface and…
CVE-2025-52533 — High (CVSS 8.7): Improper Access Control in an on-chip debug interface could allow a privileged attacker to enable a debug interface and…
CVE-2025-9709 — High (CVSS 8.6): On-Chip Debug and Test Interface With Improper Access Control and Improper Protection against Electromagnetic Fault…
CVE-2024-41692 — High (CVSS 8.6): This vulnerability exists in SyroTech SY-GPON-1110-WDONT Router due to presence of root terminal access on a serial…
CVE-2025-65821 — High (CVSS 7.5): As UART download mode is still enabled on the ESP32 chip on which the firmware runs, an adversary can dump the flash…

Browse all CWE-1191 vulnerabilities →